#include<cstdio>
#include<cstring>
#define LEN_MAX 2000000
#define N_MAX 1000
using namespace std;

char P[LEN_MAX+1], T[LEN_MAX+1];
int poz[N_MAX], L[LEN_MAX+1] ,nr, n, m;

int minim(int x, int y)
{
    if(x < y) return x;
    return y;
}

int main()
{
    int i, k, x;
    FILE *fin, *fout;
    fin = fopen("strmatch.in","r");
    fout = fopen("strmatch.out","w");
    fscanf(fin,"%s",P);
    fscanf(fin,"%s",T);
    m = strlen(P);
    n = strlen(T);
    k = 0;
    for(i=1; i<m; i++)
    {
        while(k > 0 && P[i] != P[k])
            k = L[k-1];
        if(P[i] == P[k])
            k++;
        L[i] = k;
    }
    k = 0;
    for(i=0; i<n; i++)
    {
        while(k > 0 && T[i] != P[k])
            k = L[k-1];
        if(T[i] == P[k])
            k++;
        if(k == m)
        {
            nr++;
            if(nr <= 1000)
                poz[nr-1] = i-m+1;
        }
    }
    fprintf(fout,"%d\n",nr);
    x = minim(nr,1000);
    for(i=0; i<x; i++)
        fprintf(fout,"%d ",poz[i]);
    fprintf(fout,"\n");
    return 0;
}